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Water Supply at Los Alamos during 1997

Description: Production of potable municipal water supplies during 1997 totaled about 1,285.9 million gallons from wells in the Guaje, Pajarito, and Otowi well fields. There was no water used from the spring gallery in Water Canyon or from Guaje Reservoir during 1997. About 2.4 million gallons of water from Los Alamos Reservoir was used to irrigate public parks and recreational lands. The total water usage in 1997 was about 1,288.3 million gallons, or about 135 gallons per day per person living in Los Alamos County. Groundwater pumpage was down about 82.2 million gallons in 1997 compared with the pumpage in 1996. Four new replacement wells were drilled and cased in Guaje Canyon between October 1997 and March 1998. These wells are currently being developed and aquifer tests are being performed. A special report summarizing the geological, geophysical, and well construction logs will be issued in the near future for these new wells.
Date: December 1, 1998
Creator: Maes, M. N.; McLin, S. G. & Purtymun, W. D.
Partner: UNT Libraries Government Documents Department

Investigation of excess thyroid cancer incidence in Los Alamos County

Description: Los Alamos County (LAC) is home to the Los Alamos National Laboratory, a U.S. Department of Energy (DOE) nuclear research and design facility. In 1991, the DOE funded the New Mexico Department of Health to conduct a review of cancer incidence rates in LAC in response to citizen concerns over what was perceived as a large excess of brain tumors and a possible relationship to radiological contaminants from the Laboratory. The study found no unusual or alarming pattern in the incidence of brain cancer, however, a fourfold excess of thyroid cancer was observed during the late-1980`s. A rapid review of the medical records for cases diagnosed between 1986 and 1990 failed to demonstrate that the thyroid cancer excess had resulted from enhanced detection. Surveillance activities subsequently undertaken to monitor the trend revealed that the excess persisted into 1993. A feasibility assessment of further studies was made, and ultimately, an investigation was conducted to document the epidemiologic characteristics of the excess in detail and to explore possible causes through a case-series records review. Findings from the investigation are the subject of this report.
Date: April 1, 1996
Creator: Athas, W.F.
Partner: UNT Libraries Government Documents Department

Structural Health Monitoring Studies of the Alamosa Canyon and I-40 Bridges

Description: From 1994 to 1997 internal research grants from Los Alamos National Laboratory's Laboratory Direct Research and Development (LDRD) office were used to fund an effort aimed at studying global vibration-based damage detection methods. To support this work, several field tests of the Alamosa Canyon Bridge have been performed to study various aspects of applying vibration-based damage detection methods to a real world in situ structure. This report summarizes the data that has been collected from the various vibration tests performed on the Alamosa Canyon Bridge, analyses of these data, and the results that have been obtained. Initially, it was the investigators' intent to introduce various types of damage into this bridge and study several vibration-based damage detection methods. The feasibility of continuously monitoring such a structure for the onset of damage was also going to be studied. However, the restrictions that the damage must be relatively benign or repairable made it difficult to take the damage identification portion of the study to completion. Subsequently, this study focused on quantifying the variability in identified modal parameters caused by sources other than damage. These sources include variability in testing procedures, variability in test conditions, and environmental variability. These variabilities must be understood and their influence on identified modal properties quantified before vibration-based damage detection can be applied with unambiguous results. Quantifying the variability in the identified modal parameters led to the development of statistical analysis procedures that can be applied to the experimental modal analysis results. It is the authors' opinion that these statistical analysis procedures represent one of the major contributions of these studies to the vibration-based damage detection field. Another significant contribution that came from this portion of the study was the extension of a strain-energy-based damage detection method originally developed for structures that exhibit beam-bending response to structures that ...
Date: July 1, 2000
Creator: Farrar, Charles R.; Cornwell, Phillip J.; Doebling, Scott W. & Prime, Michael B.
Partner: UNT Libraries Government Documents Department

Publications of LASL research, 1967--1971

Description: This bibiography is a compilation of unclassified publications of work done at the Los Alamos Scientific Laboratory (LASL) for the years 1967 through 1971. Papers published in those years are included regardless of when they were actually written. Publications received too late for inclusion in earlier compilations are also included. Declassification of previously classified reports is considered to constitute publication. All classified issuances are omitted. The bibliography includes LASL reports, papers released as non-LASL reports, journal articles, books, chapters of books, conference papers (whether published separately or as part of conference proceedings issued as books or reports) papers published in congressional hearings, theses, and U. S. patents. Papers are included in the following categories: accelerators, aerospace studies, analytical technology, astrophysics, atomic physics, biology and medicine, chemical kinetics, chemistry, cryogenics, crystallography, engineering and equipment, EPR and NMR studies, equation of state and shock studies, explosives and detonations, fission physics, health and safety, hydrodynamics and radiation transport, instruments, mathematics and computers, mediumenergy physics, metallurgy and ceramics technology, molecular spectroscopy, Moessbauer effect, neutronics and criticality studies, nuclear physics, nuclear safeguards, optics and lasers, organic chemistry, physics, plasma physics, propulsion systems, reactor technology, solid state science, theoretical physics, thermionics, -waste disposal, and miscellaneous. Author, report number, and KWIC indexes are included. (RWR)
Date: September 1, 1973
Creator: Kerr, A. K.
Partner: UNT Libraries Government Documents Department

Los Alamos National Laboratory: Information on Security of Classified Data, Nuclear Material Controls, Nuclear and Worker Safety, and Project Management Weaknesses

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "The Los Alamos National Laboratory (LANL), which is operated by the National Nuclear Security Administration (NNSA), is responsible for, among other things, designing nuclear weapons. Over the past decade, we have documented numerous security, safety, and project management weaknesses at NNSA's nuclear weapons complex, including LANL. In particular, LANL has experienced a series of high-profile security incidents that have drawn attention to the laboratory's inability to account for and control classified information and maintain a safe work environment. In July 2004, LANL's director declared a suspension--or stand-down--of laboratory operations to address immediate concerns, including the loss of classified computer disks. During the stand-down, laboratory teams identified more than 3,400 security and safety issues. As a result of systemic management concerns, and the fact that the laboratory contractor--the University of California--did not adequately address these problems, the Department of Energy (DOE) decided in 2003 to allow other organizations to compete for the management contract at LANL. The University of California, which had been the exclusive management and operating contractor since the 1940s, was replaced in June 2006 by Los Alamos National Security, LLC, (LANS). LANS is a consortium of contractors that includes Bechtel National, Inc.; the University of California; BWX Technologies, Inc.; and the Washington Group International, Inc. In this context, Congress asked us to provide information detailing recent security, safety, and management problems at LANL. We provided Congressional staffs with information on these issues. This report summarizes and formally transmits the information provided to Congressional staffs. As requested, this report provides information on (1) security incidents that compromised or potentially compromised classified information, (2) incidents involving the loss of or failure to properly account for special nuclear material (highly enriched uranium or plutonium) and radiological material, (3) nuclear ...
Date: January 10, 2008
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department

2003 Los Alamos National Laboratory Annual Illness and Injury Surveillance Report, Revised September 2007

Description: Annual Illness and Injury Surveillance Program report for 2003 for Los Alamos National Lab. The U.S. Department of Energy’s (DOE) commitment to assuring the health and safety of its workers includes the conduct of epidemiologic surveillance activities that provide an early warning system for health problems among workers. The IISP monitors illnesses and health conditions that result in an absence of workdays, occupational injuries and illnesses, and disabilities and deaths among current workers.
Date: October 4, 2007
Creator: U.S. Department of Energy, Office of Health, Safety and Security, Office of Illness and Injury Prevention Programs
Partner: UNT Libraries Government Documents Department

A Survey of Some Los Alamos County Canyons for Radioactive Contamination, Spring 1953 to Spring 1955

Description: Abstract: This document is a survey analysis of soil samples from Los Alamos, Pueblo, Bayo, and Mortandad canyons to determine the presence and activities of radioactive contaminants. Also included are the results of analyses of a few samples of grass and of surface water. This survey covers the period from spring 1953 to spring 1955.
Date: April 1956
Creator: Dodd, Aubrey O.
Partner: UNT Libraries Government Documents Department

Chemical and isotopic variations of precipitation in the Los Alamos Region, New Mexico

Description: Precipitation collectors were installed at 14 locations on the Pajarito Plateau and surrounding areas to study variations in chemistry, stable isotopes and tritium for the years 1990 to 1993. The volume of precipitation was measured and samples were collected and analyzed every three to four months. All precipitation samples contain <2.50 mg/kg Cl and have pH values ranging from 5.4 to 6.7. The stable isotope ({delta}D/{delta}{sup 18}O) results record seasonal variations in precipitation as the weather patterns shift from sources in the Pacific Ocean to sources in the Gulf of Mexico. The stable isotope results also show isotopic variations due to elevation differences among the collection points. The tritium contents ({sup 3}H) in rain samples vary from 6.54 T.U. to 141 T.U. Contouring of high tritium values (e.g. >20 T.U.) from each collection period clearly shows that Laboratory activities release some tritium to the atmosphere. The effect of these releases are well below the limits set by the Environmental Protection Agency for drinking water (about 6200 T.U.). The magnitude of the releases is apparently greatest during the summer months. However, anomalous tritium values are detected as far north as Espahola, New Mexico for many collection periods. Tritium releases by the Laboratory are not constant; thus, the actual amount of tritium in each release has been diluted in the composite samples of our three to four month collection periods.
Date: February 1, 1995
Creator: Adams, A.I.; Goff, F. & Counce, D.
Partner: UNT Libraries Government Documents Department

Human brain mapping: Experimental and computational approaches

Description: This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This program developed project combined Los Alamos' and collaborators' strengths in noninvasive brain imaging and high performance computing to develop potential contributions to the multi-agency Human Brain Project led by the National Institute of Mental Health. The experimental component of the project emphasized the optimization of spatial and temporal resolution of functional brain imaging by combining: (a) structural MRI measurements of brain anatomy; (b) functional MRI measurements of blood flow and oxygenation; and (c) MEG measurements of time-resolved neuronal population currents. The computational component of the project emphasized development of a high-resolution 3-D volumetric model of the brain based on anatomical MRI, in which structural and functional information from multiple imaging modalities can be integrated into a single computational framework for modeling, visualization, and database representation.
Date: November 1, 1998
Creator: Wood, C.C.; George, J.S.; Schmidt, D.M.; Aine, C.J.; Sanders, J. & Belliveau, J.
Partner: UNT Libraries Government Documents Department

Analytical Benchmark Test Set for Criticality Code Verification

Description: A number of published numerical solutions to analytic eigenvalue (k{sub eff}) and eigenfunction equations are summarized for the purpose of creating a criticality verification benchmark test set. The 75-problem test set allows the user to verify the correctness of a criticality code for infinite medium and simple geometries in one- and two-energy groups, one- and two-media, and both isotropic and linearly anisotropic neutron scattering. A three- and six-energy group infinite medium problem are also included in the test set. The problem specifications will produce both k{sub eff}=1 and the quoted k{sub {infinity}} to at least five decimal places. Additional uses of the test set for code verification are also discussed. Los Alamos report LA-13511 contains the details of all 75 test problems.
Date: September 20, 1999
Creator: Sood, A.; Forster, R.A. & Parson, D.K.
Partner: UNT Libraries Government Documents Department

University of California Directed Research and Development (UCDRD) Activities for Fiscal Year 1997`

Description: Strong magnetic fields are a powerful tool for studying physical properties of low-dimensional semiconductor structures. The pulsed magnet facilities at the Los Alamos National High Magnetic Field Laboratory (NHMFL) have provided an unique opportunity to explore new correlated electronic phases of quantum Hall devices in ultra-high magnetic fields. We have performed both magneto-transport and photoluminescence experiments in the pulsed magnet for fields up to 50 T and temperatures down to 500 mK to study several types of GaAs/AlGaAs heterostructures. The findings of our exploratory experiments are summarized.
Date: March 25, 1999
Creator: Porter, J.
Partner: UNT Libraries Government Documents Department

Laboratory and Field Studies Related to Radionuclide Migration at the Nevada Test Site in Support of the Underground Test Area Program and Hydrologic Resources Management Project October 1, 1999-September 30, 2000

Description: This report details the work of Chemistry Division personnel from Los Alamos National Laboratory in FY 2000 for the US Department of Energy/Nevada Operations Office under their Defense Programs and Environmental Restoration Divisions. Los Alamos is one of a number of agencies collaborating in an effort to describe the present and future movement of radionuclides in the underground environment of the Nevada Test Site. This fiscal year we collected and analyzed water samples from a number of expended test locations at the Nevada Test Site. We give the results of these analyses and summarize the information gained over the quarter century that we have been studying several of these sites. We find that by far most of the radioactive residues from a nuclear test are contained in the melt glass in the cavity. Those radionuclides that are mobile in water can be transported if the groundwater is moving due to hydraulic or thermal gradients. The extent to which they move is a function of their chemical speciation, with neutral or anionic materials traveling freely relative to cationic materials that tend to sorb on rock surfaces. However, radionuclides sorbed on colloids may be transported if the colloids are moving. Local conditions strongly influence the distribution and movement of radionuclides, and we continue to study sites such as Almendro, which is thermally quite hot, and Bilby where radionuclides do not appear to have moved a short distance from the cavity. We have begun field use of a tool that allows us to measure important groundwater properties in situ. We conclude our report by noting document reviews and publications produced in support of this program.
Date: January 1, 2001
Creator: Finnegan, David L. & Thompson, Joseph L.
Partner: UNT Libraries Government Documents Department